Exam objective

Core 1 2.0: Wireless Technologies

A+ Topic

Wireless Technologies for A+

This A+ topic package covers technician-level recognition and basic troubleshooting for common wireless technologies in A+ Core 1 scope. It includes Wi-Fi standards/generations, band/channel tradeoffs, wireless security modes, basic configuration checks (SSID, band, passphrase, client settings), interference and signal-issue diagnosis, and short-range wireless technologies (Bluetooth, NFC, RFID).

Start first lesson

6 lessons in this topic

1

Wi-Fi Standards & Generations

Recognize common Wi-Fi generations, their typical band associations, and the compatibility problems that appear in support scenarios.

2

Bands, Channels & Width

Compare 2.4 GHz, 5 GHz, and 6 GHz tradeoffs and diagnose basic channel congestion or compatibility issues.

3

Wireless Security Modes

Recognize common wireless security options, choose the stronger modern setting, and spot simple compatibility or credential mismatches.

4

Wireless Configuration Basics

Check SSID, band, security, and client settings to identify likely configuration problems without drifting into full router administration.

5

Interference & Signal Issues

Diagnose weak wireless performance caused by distance, barriers, congestion, interference, or poor access point placement.

6

Bluetooth, NFC & RFID

Differentiate common short-range wireless technologies by range, purpose, and likely support scenario.

Common mistakes to avoid

1

- Mixing up the letter names with relative speed: letters do not encode throughput exactly, but later letters tend to indicate newer/typically faster standards. "ac" and "ax" are newer than "n".

2

- Thinking wider channel width always equals better user experience; in congested areas wider channels can worsen interference and reduce overall throughput. - Believing 5 GHz is always better; if range is required, 2.4 GHz may be the sensible choice.

3

- Equating WPA2 with being perfectly secure; while acceptable for many consumer scenarios, WPA3 offers improved protections. - Thinking password change on the router will automatically update client saved profiles; clients must re-enter the new passphrase.

4

- Assuming the device will automatically pick the correct band; users may need to choose between "NetworkName_2.4G" and "NetworkName_5G" if the AP exposes band-specific SSIDs. - Thinking hidden SSID increases security; it primarily causes usability issues.